Sisters Elizabeth Marie Grube, age 70 (left) and Elaine Volkert, age 65 (right) have been charged with dealing heroin from their homes on the same block of Stroud township, Pa.

A northeastern Pennsylvania prosecutor says he's shocked that two sisters accused of selling heroin are 65 and 70 years old.

Monroe County District Attorney David Christine told reporters Wednesday that to look at the suspects, it's hard to believe the charges they face.

Police say the women are believed to have been dealing heroin out of their Stroudsburg-area homes for almost six months and pulling in about $10,000 a week in sales.

Elizabeth Marie Grube, 70, and her sister, Elaine Volkert, 65, were arrested April 14 and face drug charges after investigators seized 400 bags of heroin, with a street value of $8000, as well as $200 in cash from Grube's home, CBS 3 News in Stroudsburg, Pa., reported.

At Volkert's home, on the same block, police found $20,000 worth of heroin, plus more cash, and Oxycontin and marijuana.

Volkert's neighbor, Sandy Hunter, had no clue the sisters were selling drugs.

"I never expected this, really," Hunter told The Morning Call of Lehigh Valley. "I couldn't believe it. I never would have expected that from her because she's a nice person."

The sisters live modestly in trailer homes that rent for $600 a month, The Morning Call reported.